GIP Receptor
Also known as: GIPR · gastric inhibitory polypeptide receptor
A G-protein coupled receptor activated by glucose-dependent insulinotropic polypeptide, expressed in adipose tissue, pancreatic beta cells, and brain.
The GIP receptor was long considered the lesser cousin of GLP-1R until Tirzepatide demonstrated that combined GLP-1/GIP agonism produces weight and glucose effects superior to GLP-1R activation alone. The current mechanistic hypothesis is that GIP receptor activation in adipose tissue enhances lipid handling and improves GLP-1R sensitivity, producing synergistic rather than merely additive effects.
Retatrutide — the triple agonist hitting GLP-1, GIP, and glucagon receptors — represents the current frontier of this receptor-stacking strategy.
Related Terms
GLP-1 Receptor
A G-protein coupled receptor activated by glucagon-like peptide-1, expressed primarily in pancreatic beta cells, the central nervous system, and gastrointestinal tract.
GLP-1 Agonist
A class of peptides that activates the GLP-1 receptor, researched for effects on glucose regulation, gastric motility, and appetite signaling.
Receptor Agonist
A molecule that binds to a receptor and triggers the same biological response as the endogenous ligand.
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